I am sticking an 18" RE Audio XXX in an 11.5 Cu.Ft Sealed Sonotube enclosure (with 1 lb of polyfil per Cu.Ft). Based on the weight of the cone and the looseness/tightness of the suspension, would I be better served to place the driver firing up or down, or is it a wash? My concern is the useable life of the driver. I want to maximize that. Thank you for any help.
I cant comment on the longevity of the driver's life in either orientation, as ive only had mine a few months, and they are side-firing. All I can say is you better give it plenty of room for that excursion if you down-fire!!
According to the spec that I have on the XXX18, modeled in Unibox, I see a 2% loss in linear travel when used downfiring (or up, I'd assume). Sounds like you'd be okay for regular use but it's hard to say about the long term implementation. The XXX18 has a pretty high moving mass so it could sag over time.
Scott-- Thank you. If I hear what you are saying, the sag will happen with either configuration, up or down firing, so the correct comparison is with up/down versus side-firing. That makes sense, and since I am going up or down, I guess my initial question is flawed! Thanks again.